- Adds -root parameter, to treat the whole desktop as one display,
applying the image over the whole, instead of per each display
- No longer depends on xrandr(1) in the run-time
Found out via: repology.org
`for' loop initial declaration variable outside; this was upsetting C99:
hsetroot.c: In function 'load_image':
hsetroot.c:196: error: 'for' loop initial declaration used outside C99 mode
Tested on: powerpc, sparc64
select the best aspect ratio and display image with minimal scaling yet not
centered. This mode is useful when one wants to use an image with author's
copyright in the lower corner and wants to hide it. Existing modes did not
always provide the best possible result. While here, take maintainership.
